table {
    width: 100%;
    border-collapse: collapse;
}

td, th {
    padding: 15px;
}

th {
    text-align: center;
    vertical-align: top;
}

tr.impair {
    background-color: antiquewhite;
}

/* responsive telephones*/
@media (max-width: 768px) {

td, th {
    padding: 3px;
}

}